Add a QUIC proxy server to the list of QUIC servers supported at start up

components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
index a16e7149ce804e8184f8270707607fae49c78b41..7392f2364e7f820916f52c89fc5cf71b3db7b455 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
@@ -4,6 +4,7 @@
 
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
 
+#include <map>
 #include <string>
 #include <vector>
 
@@ -60,6 +61,18 @@ bool IsIncludedInFieldTrial(const std::string& name) {
                           base::CompareCase::SENSITIVE);
 }
 
+// Returns the variation value for |parameter_name|. If the value is
+// unavailable, |default_value| is returned.
+std::string GetStringValueForVariationParamWithDefaultValue(
+    const std::map<std::string, std::string>& variation_params,
+    const std::string& parameter_name,
+    const std::string& default_value) {
+  const auto it = variation_params.find(parameter_name);
+  if (it == variation_params.end())
+    return default_value;
+  return it->second;
+}
+
 }  // namespace
 
 namespace data_reduction_proxy {
@@ -185,6 +198,15 @@ const char* GetQuicFieldTrialName() {
   return kQuicFieldTrial;
 }
 
+bool IsZeroRttQuicEnabled() {
+  if (!IsIncludedInQuicFieldTrial())
+    return false;
+  std::map<std::string, std::string> params;
+  variations::GetVariationParams(GetQuicFieldTrialName(), &params);
+  return GetStringValueForVariationParamWithDefaultValue(
+             params, "enable_zero_rtt", "false") == "true";
+}
+
 bool IsConfigClientEnabled() {
   // Config client is enabled by default. It can be disabled only if Chromium
   // belongs to a field trial group whose name starts with "Disabled".